You are overhyped.
Ya think??? 
Just keep to a decent sleep schedule and sleep as much as you
can on the flight.
Take the airborne tablets in orange juice before you board the
plane another set when you woke during the flight.
Flying East induce jetlag more then flying west.
Have some vicks handy, it keeps your nose from feeling too dry
or cold during the flight and the hotel aircon.
Unfortunately, in all the years that I've flown, I've
never managed to sleep on a flight. Believe me,
short of using OTC sleep-inducing drugs, I've tried, but the
uncomfortable seats and noisy environment have thus far proven
insurmountable. That's the reason I've never looked forward to the
21-hour flights to Singapore--I usually look like a zombie when I
arrive there on account of the lack of sleep. The flight to Narita
is 12 hours, so hopefully I won't quite resemble The Walking Dead
when I get there.
Thanks for the Vicks suggestion, but you're forgetting that
cold, dry weather is the norm for Minnesota for about 7 months out
of the year, so It's not a big deal for me. 
